【摘 要】
：
A new heteropolyoxotungstate[(C2H4N2)4(P4Co3W4O28H6)(H2C2O4)]n with a threedimensional framework was hydrothermally synthesized.The compound crystallizes in a t
【机 构】
：
Products Quality Supervision and Inspection Institute of Jilin City,Key Laboratory of Polyoxometalat
论文部分内容阅读
A new heteropolyoxotungstate[(C2H4N2)4(P4Co3W4O28H6)(H2C2O4)]n with a threedimensional framework was hydrothermally synthesized.The compound crystallizes in a tetragonal system,space group 141/a with a = 17.1006(17),b = 17.1006(7),c = 10.7525(5)(A),V= 3144.2(2)(A)3,Z = 4,Dc = 3.795 g·cm3,F(000)= 3300,MoKα(λ = 0.71073(A)),μ = 16.460 mm-1,the final R =0.0335 and wR = 0.0776.In the heteropolyoxotungstate,tungsten-oxygen octahedra are linked by sharing two cis-vertexes into an infinite helical chain extending along the c axis.Cobalt atoms in the octahedral geometry act as the linkers of these chains,forming a three-dimensional framework.The cobalt and phosphorus atoms in the tetrahedral geometry play a role in stabilizing the threedimensional framework.Ethylenediamine molecules are polymerized into organic chains which locate in the interspaces of the framework in the way of interwinding with the W-O chains.
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